Astigmatism develops when the corneal focusing surface of the eye is not spherical. Instead the cornea has different curvatures of focus creating image splitting blurred vision.
Correction of most astigmatism can be optical (glasses and contact lenses) or surgical (Laser Vision Correction – LASIK).
To evaluate the curvatures of the eye it is necessary to take measurements. Instruments that for such determinations could be a basic optical keratometer:
Or for more complex evaluations a digital topographer:
Glasses can be prescribed to restore image clarity by joining the blurred separated images:
Similarly with contact lenses:
In select cases astigmatism patients can benefit from Laser Vision Correction LV or LASIK surgery. If a patient has a clinically significant cataract and coexisting stigmatism corrected femtosecond lasers can be used to address both conditions in one setting.